Braiding-bobbin device



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T e b A. ZEHNDER ET AL BRAIDING 'BOBBIN DEVICE Filed July 8, 1930 jan. e, w31.

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Patented Jan. 6, k1931 vADonr ZEHNDER, or BIRMnNsToR-r, AND JEAN KAPPELER, or BADEN," SWITZERLAND PATEN .'BRAIDING-BOBBIN DEVICE Application led July 8, 1930, Serial No. 466,537, and in Switzerland July 11, 1929.

The invention relates to a thread guiding' arrangement for braiding bobbins having a thread tensioning device located within a hollow bobbin carrying spindle. It is characterized by the feature that the thread guide is constructed as a fork with limbs set at an upwardly diverging angle. It is indeed known to provide a bobbin with a thread guide in the .torni of eyeless guide wires, but with the present construction `of kthread guide the thread during upward movement on the diverging fork limbs undergoes an increasing braking effect which ensures the thread leaving the bobbin tangentially.

The accompanying drawing illustrates by way of example an embodiment of the invention.

Figure 1 is a front View.

Figure 2 is a side view, and

Figure 3 is a vertical axial section with the thread being drawn 0E. f

The bobbin a of'thread having a sleeve of wood or better of paper, is carried by a hollow spindle 7) to which the thread guide c is secured. The latter consists of a wirefork which is coiled to grip the spindle b and has two limbs c1, o2 at anfupwardly diverging angle, forming two separated guide paths for the thread. An eye d holds the fork limbs firmly together at their lower` ends and thus ensures a firm seating of the guide on the spindle At their upper ends the limbs are joined by a bridge e.

llithin the hollow spindle b is a tension spring f which is furnished at its upper end with an eye f1 forthe thread and in known manner determines the tension of the thread.

The upper end al of the bobbin is provided with a guiding and braking rim `for thethread. Flat teeth may be formed thereon for coaction with a small pawl which may be of advantage in view of the intermittent rotation of the bobbin corresponding with the drawing off of the thread. Such teeth are i5 not essential however and will not be used with paper bobbins.

The thread a: leaving the bobbin a tangentially is wound round the limbs o1, 02 in the manner shown in Figurel and passes thence over the bridge e and over the upper end of the bobbin directlyto the eye f1 of the spring f. When the thread is drawn oli', in proportion as it is used, the spring 7 is stretched and inally the bobbin a yields to the tension in the length of thread between the eye f1 and the bridge e, also acting as a brake, and thus rotates through a certain angle. i

During the drawingoii' of the ythread the latter moves up and down on limbs 01, G2 of the fork, receiving a certain degree of brak ing duringthe upward movement due to the divergence voit' the limbs. Y

Upon a breakageof the thread, the device p to which the lower yend of the spring f is attached, falls into the path of a known stopping device not illustrated;

What we claim is i 1. In braiding bobbin devices, the combination of a hollow bobbin carrying spindle, thread tensioning means located therein and a forked thread-guide with limbs set at an upwardly diverging angle fastened ony Said spindle.

2. In braiding bobbin devices. the combination of a hollow bobbin carrying spindle, thread tensioning means located therein and a forked wire thread-guide with limbs set at an upwardly diverging angle and having a coiled part seated on said spindle.

VIn witness whereof we have hereunto signed our names this 21st day of June, 1930.

' ADOLF ZEHNDER. JEAN KAPPELER. 

